Syafi`e, Imam (2025) Desain Antena Mikrostrip Circular Untuk Pengukuran Partial Discharge Pada Peralatan Tegangan Tinggi. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Dalam studi ini peneliti mendesain antena mikrostrip circular untuk deteksi partial discharge (PD) pada peralatan tegangan tinggi. Desain antena ini memiliki ukuran yang tergolong kecil yang dapat mendeteksi PD di media isolasi udara dan minyak. Adapun beberapa metode dalam mendesain antena mikrostrip untuk memperoleh hasil yang diinginkan diantaranya memotong bagian ground dan menambahkan slot “i” pada ground dengan parameter sweep. Kelebihan dari antena mikrostrip ini dapat mendeteksi PD dalam posisi horizontal ataupun vertikal dan variasi sudut yang beragam. Target yang digunakan pada parameter antena ini meliputi frekuensi kerja 200 MHz – 1.8 GHz, return loss kurang dari -10 dB, VSWR (Voltage Standing Wave Ratio) kurang dari 2, impedansi input 50 Ω, nilai gain lebih dari 2 dB, dan pola radiasi omnidireksional. Desain antena yang diperoleh menggunakan patch circular berukuran 18 x 11 cm2 dan terbukti bisa medeteksi partial discharge di media isolasi udara dan minyak. Desain antena ini memiliki frekuensi optimal di 0.94 GHz sesuai dengan hasil simulasi. Pegujian diantaranya dengan elektroda jarum-plat dengan variasi jarak elektroda 1, 1.5 dan 2 cm pada media isolasi udara dan minyak, pengujian PD dengan variasi jarak antena, pengujian PD dengan variasi ketinggian antena. Nilai hasil pengujian meliputi single shot di udara 4.2546 µs dan di minyak 4.2501 µs. Hasil pengujian performa antena yaitu jarak dan ketinggian antena di media isolasi udara dengan jarak 20 cm menghasilkan magnitude tegangan 0.221V, jarak 30 cm menghasilkan magnitude tegangan 0.221V, jarak 40 cm menghasilkan magnitude tegangan 0.157V, jarak 50 cm menghasilkan magnitude tegangan 0.122, jarak 60 cm menghasilkan magnitude tegangan 0.101V dan pengujian di minyak pada jarak 20 cm menghasilkan magnitude tegangan 0.221V, jarak 30 cm menghasilkan magnitude tegangan 0.18V, jarak 40 cm menghasilkan magnitude tegangan 0.132V, jarak 50 cm menghasilkan magnitude tegangan 0.108, jarak 60 cm menghasilkan magnitude tegangan 0.104V. Hasil pengujian performa antena di udara pada ketinggian 0 cm menghasilkan magnitude tegangan 0.221V, ketinggian 10 cm menghasilkan magnitude tegangan 0.102V, ketinggian 20 cm menghasilkan magnitude tegangan 0.099V, ketinggian 30 cm menghasilkan magnitude tegangan 0.086, ketinggian 40 cm menghasilkan magnitude tegangan 0.088V dan pengujian di minyak pada ketinggian 0 cm menghasilkan magnitude tegangan 0.106V, ketinggian 10 cm menghasilkan magnitude tegangan 0.073V, ketinggian 20 cm menghasilkan magnitude tegangan 0.057V, ketinggian 30 cm menghasilkan magnitude tegangan 0.017, ketinggian 40 cm menghasilkan magnitude tegangan 0.026V.
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In this study a circular microstrip antenna was designed to detect partial discharge (PD) in high voltage equipment. This antenna design has a relatively small size. It could detect PD in air and oil insulation media. There are several ways to achieve the expected results as designed an antenna, including cutting the ground and adding an 'i' slot to the antenna ground by parameter sweep to achieve the objective of antenna. The advantage of this antenna is that it can detect PD in a horizontal or vertical position. The goals used in the parameters of this antenna include operating frequencies of 200 MHz - 1.8 GHz, return loss less than -10 dB, VSWR (Voltage Standing Wave Ratio) less than 2, input impedance of 50 Ω, gain value greater than 2 dB and omnidirectional radiation pattern. The result antenna design uses an 18 x 11 cm2 circular patch and is proven to detect partial discharge in air and oil insulation media. According to the simulation results, this antenna design has an optimum frequency of 0.94 GHz. Three tests were conducted: a needle-to-plane electrode test with electrode spacing variations of 1, 1.5, and 2 cm in air and oil insulation media; a PD test with varying antenna spacing; and a PD test with varying antenna height. The antenna design has the potential to significantly improve partial discharge detection in high-voltage equipment, thereby enhancing monitoring and maintenance procedures in electrical systems. Test result values include single shot in air 4.2546 µs and in oil 4.2501 µs. The results of the antenna performance tests, namely the distance and height of the antenna in air insulating media with a distance of 20 cm produced a voltage magnitude of 0.221V, a distance of 30 cm produced a voltage magnitude of 0.221V, a distance of 40 cm produced a voltage magnitude of 0.157V, a distance of 50 cm produced a voltage magnitude of 0. 122, a distance of 60 cm produces a voltage of 0.101V and the test in oil at a distance of 20 cm produces a voltage of 0.221V, a distance of 30 cm produces a voltage of 0.18V, a distance of 40 cm produces a voltage of 0.132V, a distance of 50 cm produces a voltage of 0.108V, a distance of 60 cm produces a voltage of 0.104V. The results of the antenna performance test in air at a height of 0 cm produced a voltage magnitude of 0.221V, at a height of 10 cm produced a voltage magnitude of 0.102V, at a height of 20 cm produced a voltage magnitude of 0.099V, at a height of 30 cm produced a voltage magnitude of 0.086V, at a height of 40 cm produced a voltage magnitude of 0.088V. 088V and the test in oil at a height of 0 cm produces a voltage magnitude of 0.106V, a height of 10 cm produces a voltage magnitude of 0.073V, a height of 20 cm produces a voltage magnitude of 0.057V, a height of 30 cm produces a voltage magnitude of 0.017V, a height of 40 cm produces a voltage magnitude of 0.026V.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Partial Discharge, Mikrostrip Circular, Desain Antena, Udara, Minyak, Circular Microstrip, Antenna Design, Air, Oil. |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK152.A75 Electrical engineering--Safety measures |
| Divisions: | Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20101-(S2) Master Thesis |
| Depositing User: | Imam Syafi'e |
| Date Deposited: | 27 Jan 2025 07:16 |
| Last Modified: | 27 Jan 2025 07:16 |
| URI: | http://repository.its.ac.id/id/eprint/116949 |
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